11.   The fragile nature of horse racing had again taken much of the air out of the day.

12.   The incident illustrates the fragile nature of the reefs, which are underwater layers of stony skeletons secreted by invertebrate animals.

13.   The recent tragedy at an Arkansas middle school has made me stop and consider the fragile nature of hopes and dreams.

14.   Two tales from the world of amateur golf that demonstrate the fragile nature of this great sport.

15.   What has been revealed here is the fragile nature of free public debate when some people are overly offended by views different from theirs.

16.   His comments underlined the fragile nature of the U.S. effort to have the Balkan foes resolve their differences at the negotiating table instead of on the battle fields.

17.   The clash highlighted the fragile nature of the northeast, where several tribes have been fighting one another over various causes.

18.   This reveals the fragile nature of social harmony, undercut by overlapping social tensions and economic jealousy.